Dell OptiPlex XE2 (Mid 2013) - Manual (Page 12)

3. Pry the front bezel retention clips away from the chassis located at the edge of front bezel.
4. Rotate the front bezel away from the computer to release the hooks on the opposite edge of the bezel from the
chassis.
Installing the Front Bezel
1. Insert the hooks along the bottom edge of the front bezel into the slots on the chassis front.
2. Rotate the bezel toward the computer to engage the front-bezel retention clips until they click into place.
3. Install the cover.
4. Follow the procedures in After Working Inside Your Computer .
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